A helium-neon laser emits light with a wavelength of 6.33x10-7 m. What is the frequency of this light if it is traveling the speed of light?

A helium-neon laser emits light with a wavelength of 6.33x10-7 m. What is the frequency of this light if it is traveling the speed of light?

Select one:

a. 4.19x10-40 Hz

b. 4.74x1014 Hz

c. 189 Hz

d. 4.74 Hz

 

Use this formula:Wavelength=c/v, where c is the speed of light, and v the frequency.

6.33 X 10^-7=3 X 10^8/v

v=3 X 10^8/6.33 X 10^-7

v=4.74 X 10^14 Hertz, so obviously your answer is "b"